[squeak-dev] The Trunk: Collections-pre.822.mcz

Levente Uzonyi leves at caesar.elte.hu
Wed Aug 21 17:20:38 UTC 2019


On Wed, 21 Aug 2019, Tobias Pape wrote:

>
>> On 21.08.2019, at 11:57, Levente Uzonyi <leves at caesar.elte.hu> wrote:
>> 
>> Hi Marcel,
>> 
>> I suppose you meant #asSimpleSetter, but that is not an exact substitute.
>> 
>> Case #1:
>> #foo: asSimpleSetter "==> #'foo::'"
>> #foo: asMutator "==> #foo:"
>> 
>> Case #2:
>> #'' asSimpleSetter "==> #':'"
>> #'' asMutator "==> Error: subscript is out of bounds: 0"
>> 
>> So, if the plan is to go with the name #asSimpleSetter, I suggest the implementation should keep the behavior of #asMutator in Case #1.
>
> +1
>
>> Also, #copyWith: is faster than #,. :)
>
> yeah, but #, is the canonical concatenation for Smalltalk.
> I see no reason to optimize.

You don't want to concatenate strings here, but to append a character to 
the end of a string. And that's exactly what #copyWith: does.
I see no reason not to keep the optimized version. And that's what you 
+1'd above, isn't it?

Levente

>
>> 
>> 
>> Levente
>> 
>> On Wed, 21 Aug 2019, Marcel Taeumel wrote:
>> 
>>> #isSimpleSetter :-)
>>> Best,
>>> Marcel
>>>
>>>      Am 20.08.2019 21:33:47 schrieb Levente Uzonyi <leves at caesar.elte.hu>:
>>>
>>>      On Tue, 20 Aug 2019, patrick.rein at hpi.uni-potsdam.de wrote:
>>>
>>>      > I finally came around to finish this. Please find attached a changeset which:
>>>      > - deprecates #asMutator and removes #isMutator
>>>
>>>      What will be the replacement for #asMutator?
>>>
>>>      Levente
>>>
>>>      > - refactors existing calls to #asSimpleSetter
>>>      > - moves #as*Setter to the category System-Support
>>>      >
>>>      > Depending on further comments I would merge these in the next days/weeks.
>>>      >
>>>      > Bests
>>>      > Patrick
>>>      >
>>>      >> Sounds good to me!
>>>      >>
>>>      >> How about the following: I would deprecate #asMutator/#isMutator in favor of #asSimpleSetter and #isSimpleSetter. At the same time I would move the #asSimpleSetter up from Symbol to String where
>>>      #asSetterSelector already resides. Finally, I would move both pairs of selectors to the Tools (or System or Compiler?) package (I would rather not keep them scattered across MorphicExtras and Etoys as common
>>>      selectors would then also be used by System).
>>>      >>
>>>      >> Bests,
>>>      >> Patrick
>>>      >>
>>>      >>>
>>>      >>>
>>>      >>> On Thu, Mar 21, 2019 at 1:03 PM Chris Muller wrote:
>>>      >>>
>>>      >>> My main objection is about growing the "mutator" nomenclature further
>>>      >>> instead of trimming it back.
>>>      >>>
>>>      >>>
>>>      >>> +1
>>>      >>>
>>>      >>> I'm working on a GraphQL framework.
>>>      >>> GraphQL has a first-class notion of "mutations".
>>>      >>>
>>>      >>> https://graphql.org/learn/queries/
>>>      >>>
>>>      >>> Currently, we have almost zero mention of the word
>>>      >>> "mutator" in the image. I would appreciate if, instead of germinating
>>>      >>> the overloading the word, we uproot it and keep the nomenclature for
>>>      >>> this Smalltalk tooling confined to "getter" and "setter" that we have
>>>      >>> now.
>>>      >>>
>>>      >>>
>>>      >>> +1
>>>      >>>
>>>      >>> So, instead of #asMutator and #isMutator, how about #asSimpleSetter and
>>>      >>> #isSimpleSetter?
>>>      >>>
>>>      >>>
>>>      >>> +1
>>>      >>>
>>>      >>>
>>>      >>> We can end up removing a method instead of adding one. We already
>>>      >>> have many existing methods which are dealing with this conversion, all
>>>      >>> of which use the traditional Smalltalk / developer linguisitic of
>>>      >>> "setter". Browsing through all the "setter" nomenclature we have in a
>>>      >>> message names browser, including
>>>      >>>
>>>      >>> Utilities class>>#getterSelectorFor:
>>>      >>> Utilities class>>#setterSelectorFor:
>>>      >>> Utilities class>>#simpleSetterFor:
>>>      >>>
>>>      >>> which instruct Etoys users to use existing methods on String,
>>>      >>> #asSetterSelector or #asSimpleSetter.
>>>      >>>
>>>      >>> Of special note is SyntaxMorph>>#isStandardSetterKeyword: which, by
>>>      >>> its use of a utility-method implementation, acknowledges that this
>>>      >>> behavior is _application-specific_.
>>>      >>>
>>>      >>> I, myself, would just write:
>>>      >>>
>>>      >>> someSelector asSimpleSetter = someSelector "same as isMutator /
>>>      >>> isSimpleSetter"
>>>      >>>
>>>      >>> instead of #isSimpleSetter, but can appreciate both styles. They both
>>>      >>> better avoid the awkwardness of "mutator" as a general, reliable
>>>      >>> behavior when:
>>>      >>>
>>>      >>> #at: isMutator "true"
>>>      >>>
>>>      >>> while
>>>      >>>
>>>      >>> #at:put: isMutator "false"
>>>      >>>
>>>      >>>
>>>      >>> +1000. Chris is right. isMutator is a mistake.
>>>      >>>
>>>      >>>
>>>      >>> Best,
>>>      >>> Chris
>>>      >>>
>>>      >>>
>>>      >>>
>>>      >>> On Thu, Mar 21, 2019 at 1:16 AM wrote:
>>>      >>>>
>>>      >>>> Which one are you refering to? I only see Symbol>>#asMutator in Collections in the method category converting. It is also used in a few other places beyond generating instance variable accessors.
>>>      >>>>
>>>      >>>> Bests,
>>>      >>>> Patrick
>>>      >>>>
>>>      >>>>> #asMutator: is for "generate instVar accessors" code-generation, and
>>>      >>>>> that's why it's in the Tools package.
>>>      >>>>>
>>>      >>>>> IMHO, if #isMutator belongs anywhere, it isn't in Collections.
>>>      >>>>>
>>>      >>>>> Regards,
>>>      >>>>> Chris
>>>      >>>>>
>>>      >>>>>
>>>      >>>>>
>>>      >>>>> On Wed, Mar 20, 2019 at 3:08 PM Chris Muller wrote:
>>>      >>>>>>
>>>      >>>>>> Assuming a single-keyword is a mutator? Object>>#at: is not a
>>>      >>>>>> mutator. #indexOf: is not. #first: is not. Obviously many more..
>>>      >>>>>>
>>>      >>>>>> If API balance is the goal of this, perhaps #asMutator should be
>>>      >>>>>> removed instead. This feels application-specific...
>>>      >>>>>>
>>>      >>>>>> On Wed, Mar 20, 2019 at 2:05 PM wrote:
>>>      >>>>>>>
>>>      >>>>>>> Patrick Rein uploaded a new version of Collections to project The Trunk:
>>>      >>>>>>> http://source.squeak.org/trunk/Collections-pre.822.mcz
>>>      >>>>>>>
>>>      >>>>>>> ==================== Summary ====================
>>>      >>>>>>>
>>>      >>>>>>> Name: Collections-pre.822
>>>      >>>>>>> Author: pre
>>>      >>>>>>> Time: 20 March 2019, 8:05:20.383677 pm
>>>      >>>>>>> UUID: 483c4461-cee4-4a4f-82d3-fbc03e7201cc
>>>      >>>>>>> Ancestors: Collections-dtl.821
>>>      >>>>>>>
>>>      >>>>>>> Adds #isMutator to Symbol which is analogous to asMutator.
>>>      >>>>>>>
>>>      >>>>>>> =============== Diff against Collections-dtl.821 ===============
>>>      >>>>>>>
>>>      >>>>>>> Item was added:
>>>      >>>>>>> + ----- Method: Symbol>>isMutator (in category 'testing') -----
>>>      >>>>>>> + isMutator
>>>      >>>>>>> +
>>>      >>>>>>> + ^ self isKeyword and: [self numArgs = 1]!
>>>      >>>>>>>
>>>      >>>>>>>
>>>      >>>>>
>>>      >>>>
>>>      >>>
>>>      >>>
>>>      >>>
>>>      >>> --
>>>      >>> _,,,^..^,,,_
>>>      >>> best, Eliot --000000000000004a690584a05ffa--
>>>      >>
>>>      > ["mutatorAndSetter.1.cs"]
>>> 
>>


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